Machine for making sand molds.



E. J. LAHAN. MACHINE FOB MAKING SAND MOLDS.

APPLICATION FILED NOV. 26. 1908.

919,600. Patented Apr. 27, 1909.

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MACHINE FOR MAKING SAND MOLDS.

APPLICATIoN FILED Nov. z5, 190e.

Patented Apr. 27, 1909.

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E. J. LAHAN.

MACHINE FOB. MAKING- SAND MOLDS.

APPLICATION FILED NY. 25, 1908.

Patented Apr. 27, 1909'.

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@wil/5%?? Gwi h1 om n dttoznuzo EDWARD .TAB'IES LAHAN, OF QUINCY,ILLINOIS.

MACHINE FOR MAKING- SAND MOLDS.

Specification of Letters Patent.

Patented April 27', 1909.

Application led November 25, 1908. Serial No. 464,376.

.To all whom it may concern.'

Be 1t known that I, EDWARD JAMES LAHAN, a citizen of the United States,rcsidmg at Quincy, in the countyr of Adams and State oi Illinois, haveinvented a new and useful Machine for Making Sand Molds, of which thefollowing is a specification.

This invention relates to machines for making sand molds and has for itsobject to provide a strong, durable and thoroughly ellicient device ofthis character' by means of' which the formation of sand molds may beeffected with greater rapidity and with less labor' on the part of theoperator than heretoiore.

A further object of the invention is to provide improved means fortampin g or packing the sand in the molding flask, and means fortransferring the flask from the. tamping mechanism to the patterndrawing device.

A further object is to provide means for adjusting the tamping elementsor rammers verticallyT of the supporting frame, thereby to vary thepressure exerted y said tamping elements on the contents of the flask.

A further object is to provide means ior feeding the sand to the flask,and means for conveying the surplus or waste sand back to the feedhopper after each molding operation.

A still further object ol the invention .is generally to improve thisclass of devices so as to increase their utility, durability andefliciency.

Further objects and advantages will appear in the following description,it being understood that various changes in form, proportions and minordetails of construction may be resorted to within the scope of theappended claims.

In the accompanying drawings Jforming a part of this specificationz-Figure 1 is a longitudinal sectional view ot' a sand mold makingmachine constructed in accordance with my invention. Fig. 2 is an endelevation of the same. Fig. 3 is an end view partly in section of thepattern drawing device. Fig. 4 is a detail transverse sectional viewtaken on the line 4 4 of Fig. 2.

Similar numerals of' reference indicate corresponding parts in all ofthe 'figures of the drawings.

The improved machine forming the subject matter ot' the presentinvention includes a substantially rectangular' supporting frameincluding corner posts.5 connected by longitudinal and transverse beams6 and 7.

Slidably mounted on the stationary supporting frame is a movable frame 8comprising vertically disposed side members 9 connected by one or morespacing strips 10 and to the upper end of which is secured an elongatedl'rame 11. Mounted for vertical movement between the side members of thetrame 8 are a plurality oi' telescopic tamping elements 12, 13 and 14,said tann'iing elements being substantially rectangular in shape andadapted to tamp or pack the sand in the llask 15. Secured to the tampingelements arc vortically disposed rods 16 which pass through alinedopenings in the guide strips 1() and are provided with terminal eyes 17,for the purpose hereinafter referred to. The upper longitudinalconnecting beams 6 ol thc main supporting frame are extended laterallyto form supports 18 for a pair ot standards 19 in which is journalcd atransverse shalt 20. Secured to the shai't 2() arc a series olE handoperating levers 21 cach having its intermediate portion pivotallyconnected at 22 with the adjacent rods 16.

The tamping elements 12 and 15 are provided with oppositely disposedactuating rods 16, while the central tamping element 1-1 is providedwith a single actuating rod, the actuating rod ot the outer tampingelement 12 being arranged to bear against the inner faces of the sidemembers 9 for connection with the adjacent operating levers 21, therebeing vertically disposed slots 23 formed in the side members 9 topermit the passage ol the pivot pins 22.

Secured to the eye 17 of each actuating rod 16 is one end of a cord orother flexible niediuni 2l, the opposite end ol which passes oversuitable rollers or pulleys 25 secured to the upper wall of thetransverse l'ramc 11 lor attachment to a weight or counter-lialancc 2Gwhich servos to return the operating levers 21 automatically to elevatedposition a'lter said levers have been depressed to ell'ect the tainpingof the sand in the 'llask 15.

Secured to the upper wall olE the frame is a substantially triangularauxiliary frame 27 to the apex of which is secured a pulley or roller 2Ssimilar in construction to the pulley or roller 25 and. over whichpasses a llexible cable 29, one end of which is connected with theactuating rod olt the central tamping eloment 14, while the opposite cndthereof is also secured to a counter balance or weight, as shown. A

'lhe side members 9 ol' the vertically movmetal from bursting throughthe severall parts of the sand mold, while the inner tamping member 14is designed to pack the sand in the drag and around the core, theintermediate tamping element 13 being designed to pack the sand and holdthe same in the flask. Thus it will be seen that the tamping' elements12, 13 and 14 being each pivoted to an operating lever are movableindependently of each other, while the several tamping elements aremovable simultaneously to raised and lowered position by means of thepinions 31 and rack 30.

The lower sills 6 of the main supporting frame are extendedlongitudinally to form spaced horizontally disposed bars 33 to which areconnected the uprights 34 of' the pattern drawing device. I

Fastened to the inner walls of the standards 34 are blocks 35 havingtransverse grooves formed therein for the reception of correspondinglyshaped cleats 36 formed on the flask 15, said blocks being provided withstub shafts 37, one of which is provided with a crank or handle 38 sothat when the flask is positioned between the uprights 34 and the handle38 rotated, said flask may be revolved between the standards to permitthe drawing of the pattern.

The standards 34 are provided with vertically disposed slots 39 for thereception of the stub shaft 37 so as to permit vertical adjustment ofthe bearing blocks 35 and flask 15.

Slidably mounted on the inner faces of the standards 34 are spaced rackbars 40 having their lower ends connected with the bearing blocks 35 andwhich are adjusted vertically of the standards 34 to effect the verticaladjustment of the flask 15 by means of pinions 41 journaled on thetransverse shaft 42, as best shown in Fig. 4 of the drawings, therebeing a hand wheel 43 secured to one end of the shaft 42 for rotatingsaid shaft to effect the adjustment of the ask. Thus it will be seenthat by positioning the flask 15 between the standards 34 of the patterndrawing' device with the cleats 36 in engagement with the grooves of theblocks 35 and rotating the hand wheel 43, the flask may be adjustedvertically of the standards so that by revolving the crank 38 the flaskmay be rotated to permit the withdrawal of the pattern.

Arranged between the horizontal bars y33 is a track 44 on which ismounted for travel a carriage 45 adapted to receive the flask 15 andtransfer the latter from the tamping device to the pattern drawingdevice.

Above the main supporting frame is a hopper 46 having its lower endbifurcated at 47 and arranged to discharge into the flask 15, therebeing an agitator 48 mounted for rotation in the hopper 46 for thepurpose of agitatin the same and allowing the latter to flow lfreely tothe flask.

The agitator 48 is preferably in the form of a worm screw, one end ofwhich is provided with a pulley 49 which may be connected through themedium of a belt with an engine or other suitable source of power.

Arranged beneath the main supporting frame is a pit 5() having spacedsprocket wheels 51 j ournaled therein and on which is mounted forrotation an endless conveyer 52 carrying a plurality of buckets 53adapted to receive the surplus or waste sand whenlling the flask andconvey the same to a receiving pocket 54 from whence it is delivered ona conveyer 55 to the hopper 46.

rlhe conveyer 55 is preferably in the form of an endless belt or chainhaving buckets 56 similar in construction to the buckets 53, saidconveyer being arranged to travel on suitable sprocket wheels 57 andactuated from any suitable source of power. Arranged at the base of theconveyer 55 is a shaking screen or riddle 58 for removing any particlesof dirt, gravel or other foreign matter from the sand before the latteris delivered to the flask 15. The screen 58 is preferably inclined inthe direction of the conveyer 55 and oscillated through the medium of acam 59 arranged to bear against the bottom of said screen, as best shownin Fig. 1 of the drawings.

Extending transversely across the main supporting frame and secured inany suitable manner to the uprights 5 is a track 60 for the reception ofa snap flask, indicated at 61, the latter to be worked out under thetamping element 12 and rammers 13 and 14 when the floor flask 15 is notin use.

1n operation the flask is placed upon the carriage 45 and the lattermoved to a p0si tion beneath the tamping elements. Sand is thendeposited on the screen 58 and is taken up by the conveyer 55 anddischarged into the hopper 46 from whence it flows through the dischargespouts 47 of the hopper. into the flask, the surplus or waste sandfalling into the pit 50 from whence it is again conveyed to the hopperin the manner before stated. After the flask is filled with sand thetamping elements are actuated by manipulating the operating levers 21.The flask is then moved on the carriage 45 t0 the pattern drawing deviceand said flask secured to the bearing blocks 35 and elevated byactuating the hand wheel 43, the rotation of the flask 15 being effectedby revolving the crank 38, as will be readily understood.

From the foregoing description it is thought that the construction andoperation of the device will be readily understood by those skilled inthe art and further description thereof is deemed unnecessary.

Having thus described the invention what is claimed is :M

l. In a machine for making sand molds, a fiask, means for feeding sandto the flask, and a plurality of telescopic tamping ele ments movable tooperative position Within the flask.

2. In a machine for making sand molds, a flask, means for feeding sandto the flask, and a. plurality of telescopic tamping elements movablesimultaneously or independently to operative position Within the flask.

3. In a machine for making sand molds, a

flask, means for feeding sand to the flask, a plurality of telescopictamping elements movable to operative position within the flask, andoperating levers connected With the tamping elements for actuating thesame.

4. ln a machine for making sand molds, a flask, means for feeding sandto the flask, a plurality of telescopic tamping elements movable tooperative position Within the flask, rods connected with the tampingelements, operating levers pivotally connected with the rods, and meansfor normally and yieldably supporting the tamping elements in elevatedposition.

5. In a machine for making sand molds, a flask, means for feeding sandto the Flask, a plurality of telescopic tamping elements, rods securedto the tamping elements, operating levers connected with the rods, and aflexible element secured to eaeh'rod and provided with a counterbalance.

ln a machine for making sand molds, a flask, means for feeding sand tothe flask, and a plurality of telescopic tamping elements, said tampingelements being movable simultaneously or in .lepei'ulently to operativeposition within the flask, and means for automatically returning saidtamping elements to inoperative position.

7. ln a machine for making sand molds, a stationary frame, a movableframe, a flask disposed beneath the movable frame, a plurality oftelescopic tamping elements carried by the movable frame, means foradjusting the movable frame vertically of the stationary frame, andoperating levers pivotally mounted on the stationary frame andoperatively connected with the tamping elements for actuating thelatter.

S. In a machine for making sand molds, a stationary frame, a movableframe, a plurality of telescopic tamping elements carried by the movableframe, a flask disposed beneath the tamping elements, rods secured tosaid tamping elements, means for adjusting the movable frame verticallyof the stationary frame, operating levers connected with the rods, and aflexible element secured to each rod and provided with a counterweight.

fin testimony that l claim the foregoing as my own, I have heretoaffixed my signature in the presence of two Witnesses.

EDVARD JA MES LAHAN.

VitneSSeS:

ELMER SonRonDER, JOHN B. BnaNisnocK.

